The county-level homework for Henry County, Illinois — its 823 square miles, its 16 ZIP codes, its place inside the Davenport metro's coverage. TempReach USA connects homeowners here with independent local HVAC technicians; the record behind the routing is on this page.
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Henry County in one paragraph: 823 square miles in Illinois, 16 ZIP codes, a heating climate pressure read from the normals at MOLINE QUAD CITY INTL AP, IL US, and housing that answers 6,024 heating degree days against 1,040 cooling degree days a year. TempReach USA is a referral service, not an HVAC company — one call connects you with an independent local HVAC technician serving this county.
Before the narrative, the numbers themselves, because everything after them is commentary: at MOLINE QUAD CITY INTL AP, IL US, the station whose NOAA 1991-2020 normals this county is read through, an average year holds 22.2 days at 90 degrees or above, 128.7 nights at or below freezing, 38.27 inches of precipitation and degree-day totals of 6,024 heating against 1,040 cooling. Spread over 823 square miles, with the county's centroid east of the Davenport metro's centre and roughly 21 miles from the centre it is measured against, that record is Henry County's working climate.
Henry County is heating country by the numbers: 6,024 heating degree days a year, 128.7 freezing nights, and homes spread over 823 square miles all asking their systems the same question on the same January night. The cooling half of the equipment matters — 1,040 cooling degree days is not nothing — but it is the heating load that decides which systems fail, and when. Local technicians read the county that way: autumn tune-ups, honest conversations about ageing furnaces and heat exchangers, and vans stocked for the cold weeks.
The county's ground shapes the work in one more way: 823 square miles is a lot of roofs for a service map to hold, and Henry County's homes divide between its listed communities — Kewanee, Geneseo, Colona — and the roads between them. A technician routed here is working a county, not a street: the drive between calls is part of the diary, and the systems at each end of it were fitted in the decades those communities were built.
The ZIP list is the county's working map. Henry County carries 16 codes, running from 61233 through 61273 in the middle of the list to 61490 at its end, and every code on it is a small housing census of its own — the building decades, the system generations, the duct materials of its streets. Heating and cooling work routed by those codes meets the county in slices, and the slices differ more than the county's shared climate record would suggest.
Read the map around Henry County and a working region appears: Mercer County, Rock Island County, Scott County are the neighbouring names at the head of its list of 3, and together these counties form the ground a local technician actually covers. The county line decides which page describes a home; it does not decide the weather the home's system faces, the decade its street was built in, or the season its diary fills. Those are regional — and the region, on this site, is a set of county pages that link to one another, as the cards below do.
Extremes, not averages, fill Henry County's emergency diary, and the record names them precisely: 22.2 days a year at 90 degrees or above, 128.7 nights at or below freezing. Between those figures sits the ordinary year — an average of 51.2 degrees, 38.27 inches of rain — in which systems mostly age quietly. The two ends are when ageing becomes failure, which is why the county's dominant heating pressure, the taller of its two peaks, sets the rhythm of its maintenance year as well.
Henry County is a county of distinct communities rather than one continuous town: Kewanee, Geneseo, Colona and its remaining communities are among the 3 places on its record, each with its own building era and its own stock of systems. Position plays its part as well — the county sits east of the Davenport metro's centre, so its communities meet the Davenport metro's weather at slightly different distances from the centre — but it is the place list that a service diary follows, name by name, through the year.
Ownership writes part of the diary too. Across the Davenport metro, 71.1% of households own their homes, and owner-occupiers and landlords keep different maintenance calendars — owners tending to plan replacements in the shoulder seasons, rented homes more often meeting their systems at the point of failure. Henry County shares that metro pattern across its 16 ZIP codes and its listed communities, and it shows in the timing of the calls as much as in their content: planned work where the owners live, urgent work where they do not.
Put the county's coverage facts in one place and they read like this: 823 square miles of land in Illinois, 3 listed communities, 16 ZIP codes, 3 neighbouring counties on the record, and a place inside the Davenport metro coverage. No single figure describes the county; the set of them does, and it is the set this page is organised around, from the climate record above to the community and ZIP lists below.
City pages carry the metro-wide homework — housing eras, the problem ranking, services in depth. This county sits inside their coverage.
Population 12,280
Population 6,577
Population 5,189
TempReach USA is not an HVAC company. We employ no heating or cooling technicians, we run no service trucks, and we do not carry out HVAC work of any kind. This website and its call center exist for one purpose: to connect homeowners with independent local heating and cooling professionals who serve their area. When you call the number on this site, your call is routed to such a professional. From that point, everything about the job belongs to that professional and to you: the assessment, the work itself, the scheduling, what you are charged, and the terms of any agreement you reach. The professional who takes your job is solely responsible for it. The technician who arrives at your home runs their own business; they are not an employee, agent or subcontractor of TempReach USA. Our part is the information on these pages — assembled from Census Bureau housing data and NOAA climate records for each metro — and the routing of your call. We state this plainly on purpose: you should know exactly who you are hiring before anyone picks up a wrench or a gauge.
One call connects you with an independent local heating and cooling professional serving Henry County and the Davenport metro.
Call center hours: Mon-Fri 7:00 AM-10:00 PM ET | Sat 8:00 AM-10:00 PM ET | Sun 7:00 AM-9:00 PM ET